File corrupted and Camtasia crashed

I did entire video of 20 minutes. Everything was fine then camtasia hanged and refused to be normal. When I restarted the system and trying to open project, it says ".tcsproj file not found". What happened there? Does Camtasia crash so easily?

It could be related to your hardware. I was having stability problems when using an older Windows 7 machine with integrated graphics (the newest available drivers were 3-4 years old). It would not work reliably with hardware acceleration enabled, but it was much better in software only mode.

I experienced a similar issue a couple months ago after first upgrading to 2018. I contacted customer support and they were able to resolve it within a couple days... I can't remember the exact issue (I could find the correspondence if needed), but had something to do with how the .tscproj file was being handled? Either way TechSmith support jumped right on it and I was able to recover the work.